IUPAC Green Book[3] in that, in terms of its definition [4], pH = âlg a. H. it involves a single ion quantity, the activity of the hydrogen ion, which is immeasurable by any ther-. modynamically valid method and requires a convention for its evaluation.
The series officially premiered on July 17, 1999. It has received worldwide critical acclaim since its premiere and gained enormous popularity by its second season. A feature film, The SpongeBob SquarePants Movie, was released in theaters on November 19, 2004, and a sequel was released on February 6, 2015.
The SpongeBob SquarePants: Season 5, Volume 1 and 2 DVDs were released in Region 1 on September 4, 2007 and November 18, 2008, respectively, while the complete season set was released in Region 2 on November 3, 2008 and Region 4 on November 7, 2008.